<template>
  <div style="width: 100%; height: 100vh; overflow: hidden">
    <div style="width: 400px; margin: 100px auto">
      <div style="font-size: 30px; text-align: center; padding: 30px 0">
        欢迎登录
      </div>
      <el-form ref="form" :model="form" size="normal" :rules="rules">
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user-solid" v-model="form.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-lock" v-model="form.password" show-password></el-input>
        </el-form-item>
        <el-form-item>
          <div style="display: flex">
            <el-input prefix-icon="el-icon-key" v-model="form.validCode" style="width: 50%" placeholder=""
                      请输入验证码></el-input>
            <ValidCode @input="createValidCode"/>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button style="width: 100%" type="primary" @click="login">登 录</el-button>
        </el-form-item>
        <el-form-item>
          <el-button type="text" @click="$router.push('/register')">前往注册 >></el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import request from "../utils/request";
import ValidCode from "../components/ValidCode";

export default {
  name: "Login",
  components: {
    ValidCode
  },
  data() {
    return {
      form: {},
      validCode: '',
      rules: {
        username: [
          {required: true, message: '请输入用户名', trigger: 'blur'},
        ],
        password: [
          {required: true, message: '请输入密码', trigger: 'blur'},
        ]
      }
    }
  },
  created() {
    // 清除用户缓存
    localStorage.removeItem("user");
  },
  methods: {
    // 接收验证码组件提交的 4位验证码
    createValidCode(data) {
      this.validCode = data;
    },
    login() {
      this.$refs['form'].validate((valid) => {
        if (valid) {
          if (!this.form.validCode) {
            this.$message.error("请输入验证码");
            return;
          }
          if (this.form.validCode.toLowerCase() !== this.validCode.toLowerCase()){
            this.$message.error("验证码错误");
            return;
          }
          request.post("/login?username="+this.form.username+"&password="+this.form.password).then(res => {
            if (res.code === '0') {
              this.$message({
                type: "success",
                message: "登录成功"
              });
              localStorage.setItem("user", JSON.stringify(res.data)); // 缓存用户信息
              this.$router.push("/"); // 登录成功之后进行页面跳转，跳转到主页
            } else {
              this.$message({
                type: "error",
                message: res.msg
              })
            }
          })
        } else {
          this.$message({
            type: "error",
            message: "请输入用户名和密码"
          })
        }
      })
    }
  }
}
</script>

<style scoped>

</style>